Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e190ada8b90ae5b…

MALICIOUS

PDF

74.0 KB Created: 2021-03-07 07:28:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 44e324147134a41c8fd49d466b8ff616 SHA-1: 445b282cba0e624fcf6902a6bdf202cd70daef93 SHA-256: 6e190ada8b90ae5baede8a0f60728c91a9b984e9bb0864087fef761a54752eaf
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One prominent URL, https://jumiwimov.ru/wix?keyword=summoners+war+private+server+3.0.2+%2528yanmengplay%2529, indicates a potential lure related to game servers. No scripts were extracted, but the PDF structure itself facilitates the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jumiwimov.ru/wix?keyword=summoners+war+private+server+3.0.2+%2528yanmengplay%2529 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444853/normal_6016f89202149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423171/normal_600c6e3b04dc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494648/normal_5fdc2acc96a5b.pdfIn PDF document text
    • https://rurevudo.weebly.com/uploads/1/3/4/2/134265418/62babad3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366628/normal_5fe8e85a09456.pdfIn PDF document text
    • https://tirepululavapiw.weebly.com/uploads/1/3/4/5/134576363/dexozawezepiketo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424011/normal_5fe3ae7fbfa25.pdfIn PDF document text
    • https://buvupoxiku.weebly.com/uploads/1/3/4/3/134329971/d52c4445b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_841b64065e7345adbb429b64434f726b.pdf?index=trueIn PDF document text
    • https://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_bd13f58141d342a5986b1d8495aeaa04.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91093876-8e1d-4000-94b8-2b28d11a9d1c/how_do_i_factory_reset_my_samsung_blu_ray_player.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f346617d-9061-46c9-a555-9441bf043a56/rich_are_becoming_richer_and_poor_are_becoming_poorer.pdfIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_5a9b38326d1545d59b7ad2b3a183c6d4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9608b473-7acb-4115-8305-7416bca97ac3/confess_by_colleen_hoover.pdfIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_46255e02c8464fc98a7ad792922171d8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/16f6b020-8989-4156-9583-f22e6c7d1e03/ideas_para_decorar_corona_de_adviento.pdfIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_c52cf1a1138847a880fe4b0ec7b18733.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f13bcb7-d97f-403e-be3f-2e20bfe2cb22/romeo_julieta_short_churchill_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/627f6afa-0d04-4593-809a-1db105fb5731/what_is_japans_economy_based_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/317c918e-3214-4339-b92e-c28f35801d8f/all_the_living_things_in_an_ecosystem_is_called.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e928634c-b194-4932-a338-c453714f4c28/delta_shopmaster_scroll_saw_ss200_parts.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1BB 6120 bytes
SHA-256: 80c7dd03e1d7c220b969edf7d3db7ac0c3179b6e532b85ab1e24663a15030632
font_01_sfnt_off0000f6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A8 10456 bytes
SHA-256: 0ce672591c26e6dfa9d59afcaf6c26745c06a3a0dc212f8e9eaebf176faffa21

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